[Ozone] Adding HardwareDisplayController implementation

ui/gfx/ozone/impl/drm_skbitmap_ozone.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_GFX_OZONE_IMPL_DRM_SKBITMAP_OZONE_H_
 #define UI_GFX_OZONE_IMPL_DRM_SKBITMAP_OZONE_H_
 
 #include "base/basictypes.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
@@ skipping 14 matching lines @@
 
   uint32_t get_framebuffer() const { return framebuffer_; };
 
   int get_fd() const { return fd_; };
 
   // Return the color depth of a pixel in this buffer.
   uint8_t GetColorDepth() const;
 
  private:
   friend class DrmAllocator;
+  friend class HardwareDisplayControllerOzone;
 
   void set_handle(uint32_t handle) { handle_ = handle; };
   void set_framebuffer(uint32_t framebuffer) { framebuffer_ = framebuffer; };
 
   // File descriptor used by the DRM allocator to request buffers from the DRM
   // stack.
   int fd_;
 
   // Buffer handle used by the DRM allocator.
   uint32_t handle_;
 
   // Buffer ID used by the DRM modesettings API. This is set when the buffer is
   // registered with the CRTC.
   uint32_t framebuffer_;
 
   DISALLOW_COPY_AND_ASSIGN(DrmSkBitmapOzone);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_OZONE_IMPL_DRM_SKBITMAP_OZONE_H_